How can I convince my apartment manager to fix my apartment issues?

It's been since January that I've requested many repairs be done. I'm not talking small little things like holes in the wall or stains on the carpet. I'm talking about the stove not working, dripping noise coming from the air conditioning unit, the toilet bowl not filling up and water leaking from underneath the bathroom sink. I've been very polite to them, I have not threatened or harassed them about the issue, I've tried to be very patient and they still won't send anybody to my place. I've paid rent and utilities on time and never had any type of strike against my apartment. I'm completely out of ideas and don't know what to do. The stove that didn't get fixed, that was reported back In January, had one of the heating coil's catch fire last week. After I called the emergency maintenance line, they finally sent someone out and replaced the stove, but not till after something dangerous happened. I'm completely out of ideas again.